Wallet? Check. Water? Check. COVID-19 test? The pre-concert checklist for music fans is about to get more complicated, as Ticketmaster is planning to check the coronavirus vaccination status of concert-goers prior to shows once a treatment is approved, Billboard reported Wednesday. The ticketing giant plans to have customers use their cellphones to verify their inoculation or whether they’ve tested negative for the virus within a 24- to 72-hour window, according to the exclusive report. The plan, which is still being ironed out, will utilize three separate components, including the California-based company’s digital ticketing app, third-party health information firms like CLEAR...